Binding-post for electric bells



{No Model.)

P. W. MANGER & 0, H. HUEBEL.

BINDING POST FOR ELECTRIC BELLS, 6B0.

N0. 571,977. Patented NOV. 24,7896.

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"mi Moms PEYERs cov, mmo-uma, wasnmcron u c UNITED STATES PATENT OFFICE.

FREDERICK WILLIAM MANGER AND OTTO HENRY HUEBEL, OF BROOKLYN, NEW YORK.

BINDING-POST FOR ELECTRIC BELLS, 800.

SPECIFICATION formingpart of Letters Patent No. 571,977, dated November 24, 1896.

Application filed March 24, 1896.

To all whom it may concern:

Be it known that we, FREDERICK WILLIAM HANGER and Orro HENRY HUEBEL, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Binding-Posts for Electric Bells, &c.; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertaius to make and use the same.

Our invention relates to an improvement in binding-posts for electric bells or other devices, the object of the invention being to so construct the binding-p0st and attach it to the instrument in such manner that it will be effectually prevented from turning with the clamping-nut.

A further object is to produce a bindingpost which shall be simple in construction, easy of application to an electric bell or other device, and which shall be efiectual in all respects in the performance of its functions.

XVith these objects in view the invention consists in certain novel features of construction and combinations and arrangements of parts, as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view of an electric bell having our improvements applied thereto. Fig. 2 is a rear view of the base-plate. Figs. 3 and 4 are detail views.

A represents a base-plate which may be provided with ears 1 2 at its lower end for the reception of the binding-posts. The rearface of the base-plate is provided at its edges with a flange 3. The ears 1 are comparatively narrow, and the flange extending around their edges forms elongated recesses 4 on the backs of said ears, the walls of each recess 4 being parallel with each other. The ears 1 2 are made with holes communicating with the recesses 41 for the accommodation of the binding-posts 6 7, respectively.

Each binding post comprises a screwthreaded stem a, having a head I), the diametrically opposite sides of which latter are fiat and adapted to lie parallel with the par- Serial No. 584,633. (No model.)

allel walls of the recesses t, and a nut or clamp 8, adapted to screw on said stem.

Before passing the post 6 through the perforation in the ear 1 a small strip or washer 9,0f insulating material,havinga hole therein, is placed in the recess 4 of said ear 1. The binding-post 6 is then passed through the insulating-strip and the hole in the ear, said insulating-strip being thus disposed between the head I) and the ear 1 and also between the flat side faces of said head and the walls of the recess 4. The hole in the ear 1 is'sufficiently larger than the diameter of the binding-post 6 to permit the latter to pass through it without making contact with the ear. An insulating-washer 9 is then placed on the binding-post 6 and made to enter a recess 10 in the outer face of said ear 1, thus further insuring the insulation of the binding-post from the ear of the base-plate. A metallic washer 11 will next be screwed on the binding-post 6 and made to bear on the insulatingwasher 9 and serves to prevent any endwise movement of the post. The metallic washer 11 also serves as one of the clamping-jaws for the wire, the other clampin g-j aw being formed by the nut 8.

- From the construction and arrangement of parts above described it will be observed that it will be impossible for the post 6 to turn independently of the nut 8; that the post will be effectually insulated from the base-plate, and that it will be prevented from any endwise movement. The same remarks apply to the post 7 and its connection with the baseplate, except as to the insulating devices, said post 7 being electrically connected with the base, the latter forming part of the electric circuit.

Our improvements are very simple in construction and are efiectual in all respects in the performance of their functions.

Having fully described our invention,what we claim as new, and desire to secure by Letters Patent, is-

1. The combination with a base-plate having a hole therein and a recess in its rear face,

said recess having straight walls, of a binding-post adapted to pass through said hole in the base-plate and having a head to enter said recess and conform thereto, a washer adapted to screw on said post whereby to prevent end wise movement thereof and a clampin g-nut on said post, substantially as set forth.

2. The combination with a base-plate having a hole therein and having a recess in its rear face, said recess having parallel walls, of a binding-post adapted to pass through the hole in the base-plate and having a head to conform to the shape of said recess, an insulating-washer disposed between said head and the walls of said recess, an insulating-washer encircling the post and bearing against the outer face of the base-plate, a metallic washer 15' adapted to screw on the post and bear against said last-mentioned insulating-washer and a clamping-nut on said post, substantially as set forth.

In testimony whereof we have signed this 20 specification in the presence of two subscribing witnesses.

FREDERICK WILLIAM HANGER. OTTO HENRY HUEBEL.

Witnesses I. H. PITT, W. W. MCCHESNEY, J r. 

